Home / 20,942.49-31,383.92-10,402.18

Finding the Fourth Proportional to 20,942.49, 31,383.92 and 10,402.18

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Solution

The fourth proportional to 20,942.49, 31,383.92 and 10,402.18 is: 15,588.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.49 : 31,383.92 = 10,402.18 : x
  2. Step 2: Convert to fraction form
    20,942.49/31,383.92 = 10,402.18/x
  3. Step 3: Cross multiply
    20,942.49x = 31,383.92 × 10,402.18
  4. Step 4: Simplify right side
    20,942.49x = 326,461,184.95
  5. Step 5: Solve for x
    x = 326,461,184.95/20,942.49
  6. Step 6: Final answer
    x = 15,588.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.